scholarly journals QED with the electron as a very small black-hole-like object

2021 ◽  
Author(s):  
John Lestone
Keyword(s):  
Black Hole ◽  
Small Black Hole

scholarly journals Instabilities of the small black hole: a view fromScript N = 4SYM

2007 ◽  
Vol 2007 (01) ◽  
pp. 001-001 ◽  
Author(s):  
Timothy Hollowood ◽  
S. Prem Kumar ◽  
Asad Naqvi
Keyword(s):  
Black Hole ◽  
Small Black Hole

scholarly journals QUASI-NORMAL MODES OF SCHWARZSCHILD–ANTI-DE SITTER BLACK HOLES: ELECTROMAGNETIC AND GRAVITATIONAL PERTURBATIONS

2002 ◽  
Vol 17 (20) ◽  
pp. 2752-2752
Author(s):  
VITOR CARDOSO ◽  
JOSÉ P. S. LEMOS
Keyword(s):  
Black Hole ◽  
Imaginary Part ◽  
Normal Modes ◽  
De Sitter ◽  
Schwarzschild Black Hole ◽  
Small Black Hole ◽  
Conformal Field ◽  
Gravitational Perturbations ◽  
Ads Spacetime ◽  
Electromagnetic Perturbation

We studied the quasi-normal modes (QNM) of electromagnetic and gravitational perturbations of a Schwarzschild black hole in an asymptotically anti-de Sitter (AdS) spacetime, extending previous works1,2 on the subject. Some of the electromagnetic modes do not oscillate, they only decay, since they have pure imaginary frequencies. The gravitational modes show peculiar features: the odd and even gravitational perturbations no longer have the same characteristic quasinormal frequencies. There is a special mode for odd perturbations whose behavior differs completely from the usual one in scalar1 and electromagnetic perturbation in an AdS spacetime, but has a similar behavior to the Schwarzschild black hole3 in an asymptotically flat spacetime: the imaginary part of the frequency goes as [Formula: see text], where r+ is the horizon radius. We also investigated the small black hole limit showing that the imaginary part of the frequency goes as [Formula: see text]. These results are important to the AdS/CFT4 conjecture since according to it the QNMs describe the approach to equilibrium in the conformal field theory. For other geometries see5,6.

scholarly journals Two-charge small black hole entropy: string-loops and multi-strings

2006 ◽  
Vol 2006 (10) ◽  
pp. 034-034 ◽  
Author(s):  
Aninda Sinha ◽  
Nemani V Suryanarayana
Keyword(s):  
Black Hole ◽  
Black Hole Entropy ◽  
Small Black Hole

scholarly journals Small black hole constituents and horizontal symmetry

2011 ◽  
Vol 2011 (6) ◽  
Author(s):  
Anna Ceresole ◽  
Sergio Ferrara ◽  
Alessio Marrani ◽  
Armen Yeranyan
Keyword(s):  
Black Hole ◽  
Small Black Hole ◽  
Horizontal Symmetry

scholarly journals The small black hole illusion

2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Pablo A. Cano ◽  
Pedro F. Ramírez ◽  
Alejandro Ruipérez
Keyword(s):  
Black Hole ◽  
Small Black Hole

scholarly journals Continuous phase transition and microstructure of charged AdS black hole with quintessence

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
Xiong-Ying Guo ◽  
Huai-Fan Li ◽  
Li-Chun Zhang ◽  
Ren Zhao
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Black Hole ◽  
Fluid Model ◽  
Critical Phenomenon ◽  
Continuous Phase ◽  
Continuous Phase Transition ◽  
Small Black Hole ◽  
Ads Black Holes ◽  
Quintessence Field

Abstract Previously, the Maxwell equal-area law has been used to discuss the conditions satisfied by the phase transition of charged AdS black holes with cloud of string and quintessence, and it was concluded that black holes have phase transition similar to that of vdW system. The phase transition depends on the electric potential of the black hole and is not the one between a large black hole and a small black hole. On the basis of this result, we study the relation between the latent heat of the phase transition and the parameter of dark energy, and use the Landau continuous phase transition theory to discuss the critical phenomenon of the black hole with quintessence and give the critical exponent. By introducing the number density of the black hole molecules, some properties of the microstructure of black holes are studied in terms of a phase transition. It is found that the electric charge of the black hole and the normalization parameter related to the density of quintessence field play a key role in the phase transition. By constructing the binary fluid model of the black hole molecules, we also discuss the microstructure of charged AdS black holes with a cloud of strings and quintessence.

scholarly journals The Tungus Event as a small Black Hole: Geophysical Considerations

1976 ◽  
Vol 175 (2) ◽  
pp. 355-357 ◽  
Author(s):  
J. O. Burns ◽  
G. Greenstein ◽  
K. L. Verosub
Keyword(s):  
Black Hole ◽  
Small Black Hole

scholarly journals Small Black/White Hole Stability and Dark Matter

Universe ◽  
2018 ◽  
Vol 4 (11) ◽  
pp. 127 ◽  
Author(s):  
Carlo Rovelli ◽  
Francesca Vidotto
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Dark Matter ◽  
Loop Quantum Gravity ◽  
Quantum Superposition ◽  
White Hole ◽  
Small Black Hole ◽  
Black And White ◽  
Minimal Eigenvalue ◽  
Simple Quantum

We show that the expected lifetime of white holes formed as remnants of evaporated black holes is consistent with their production at reheating. We give a simple quantum description of these objects and argue that a quantum superposition of black and white holes with large interiors is stable, because it is protected by the existence of a minimal eigenvalue of the area, predicted by Loop Quantum Gravity. These two results support the hypothesis that a component of dark matter could be formed by small black hole remnants.

scholarly journals P–V criticality in the extended phase–space of charged accelerating AdS black holes

2016 ◽  
Vol 31 (37) ◽  
pp. 1650199 ◽  
Author(s):  
Hang Liu ◽  
Xin-He Meng
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Black Hole ◽  
Phase Space ◽  
Dynamic Pressure ◽  
Simple Relation ◽  
Extended Phase ◽  
Small Black Hole ◽  
Ads Black Holes ◽  
Large Phase

In this paper, we investigate the P–V criticality and phase transition of charged accelerating AdS black holes in the extended thermodynamic phase–space in analogy between black hole system and van der Waals liquid–gas system, where the cosmological constant [Formula: see text] is treated as a thermodynamical variable interpreted as dynamic pressure and its conjugate quantity is the thermodynamic volume of the black holes. When the electric charge vanishes, we find that no P–V criticality will appear but the Hawking–Page-like phase transition will be present, just as what Schwarzschild-AdS black holes behave like. For the charged case, the P–V criticality appears and the accelerating black holes will undergo a small black hole/large phase transition under the condition that the acceleration parameter A and the horizon radius rh meet a certain simple relation Arh = a, where a is a constant in our discussion. To make P–V criticality appear, there exists an upper bounds for constant a. When P–V criticality appears, we calculate the critical pressure P[Formula: see text], critical temperature T[Formula: see text] and critical specific volume r[Formula: see text], and we find that [Formula: see text] is an universal number.

Sign in / Sign up

Export Citation Format

Share Document